What is the legal meaning and driver action when a pedestrian steps onto an un-signalized pedestrian zebra crossing (passadeira de peões)?

1. The driver must stop and yield absolute right of way to allow the pedestrian to cross safely
2. The driver may sound the horn and accelerate if the pedestrian has only crossed one lane
3. The driver has priority over pedestrians during daylight hours
4. The driver must swerve onto the sidewalk around the pedestrian